Intermediate band solar cells: comparison with Shockley-Read-Hall recombination
Marti A.1, Cuadra L.1, Lopez N.1, Luque A.1
1Instituto de Energi a Solar, ETSIT de Madrid, Universidad Politecnica de Madrid, Madrid, Spain
Поступила в редакцию: 9 февраля 2004 г.
Выставление онлайн: 20 июля 2004 г.
Intermediate band solar cells are characterized by the existence of a collection of energy levels in the middle of the, otherwise, conventional semiconductor bandgap. According to the standard Shockley-Read-Hall recombination theory, the states corresponding to these energy levels behave as non-radiative recombination centers and therefore, are detrimental to solar cell performance. Nevertheless, the theory of the intermediate band solar cells predicts and enhancement of the solar cell efficiency well above the limiting efficiency of single gap solar cells (63.2% vs 40.7%) when these levels exist. This paper clarifies the reasons.
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